*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body{
    width: 100vw;
    height: 100vh;
    background-color: #f4f4f4;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.container{
    width: 80vw;
    height: 400px;
    border: 1px solid #ccc;
    margin-top: 20px;
    background-color: #fff;
    box-sizing: 0 0 10px #fff;
}
table{
    width: 100%;
}
thead{
    font-size: 20px;
    text-align: center;
    
}
td{
    width: 20%;
    text-align: center;
}
.add{
    padding-top: 15px;
}